A couple of bold users who tried installing Surftrackr under Windows reported problems running the scripts. I've uploaded an amended PDF describing how to fix the problem. Thanks to Diego for persisting through adversity and letting me know how to fix the problem!
It was down to those pesky old Windows path-names. On Linux, you specify paths as (for example) '/data', but on Windows you need the drive letter, eg C:/data (using / not \ for reasons I won't go into here).